| Accession | ARO:3001889 |
| CARD Short Name | CTX-M-27 |
| Definition | CTX-M-27 is a beta-lactamase found in Escherichia coli. |
| AMR Gene Family | CTX-M beta-lactamase |
| Drug Class | penam, cephalosporin, carbapenem |
| Resistance Mechanism | antibiotic inactivation |
| Resistomes with Perfect Matches | Enterobacter cloacaewgs, Enterobacter hormaecheiwgs, Escherichia colig+p+wgs, Klebsiella pneumoniaeg+p+wgs+gi, Klebsiella quasipneumoniaep+wgs, Salmonella entericap+wgs, Shigella boydiiwgs, Shigella flexneriwgs, Shigella sonneip+wgs |
| Resistomes with Sequence Variants | Enterobacter cloacaewgs, Enterobacter hormaecheiwgs, Escherichia colig+p+wgs, Klebsiella pneumoniaeg+p+wgs+gi, Klebsiella quasipneumoniaep+wgs, Salmonella entericap+wgs, Shigella boydiiwgs, Shigella flexneriwgs, Shigella sonneip+wgs |
| Classification | 15 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + determinant of antibiotic resistance + antibiotic molecule + antibiotic inactivation [Resistance Mechanism] + antibiotic inactivation enzyme + hydrolysis of antibiotic conferring resistance + beta-lactam antibiotic + cephem + hydrolysis of beta-lactam antibiotic by serine beta-lactamase + beta-lactamase + class A beta-lactamase + penam [Drug Class] + cephalosporin [Drug Class] + carbapenem [Drug Class] |
| Parent Term(s) | 7 ontology terms | Show + confers_resistance_to_antibiotic cefazolin [Antibiotic] + confers_resistance_to_antibiotic ceftazidime [Antibiotic] + confers_resistance_to_antibiotic ertapenem [Antibiotic] + CTX-M beta-lactamase [AMR Gene Family] + confers_resistance_to_antibiotic ampicillin [Antibiotic] + confers_resistance_to_antibiotic cefixime [Antibiotic] + confers_resistance_to_antibiotic cefalotin [Antibiotic] |
| Sub-Term(s) | 2 ontology terms | Show |
| Publications | Bonnet R, et al. 2003. J Antimicrob Chemother 52(1): 29-35. Effect of D240G substitution in a novel ESBL CTX-M-27. (PMID 12775683) Tsang KK, et al. 2021. Microb Genom 7(1): Identifying novel β-lactamase substrate activity through in silico prediction of antimicrobial resistance. (PMID 33416461) |
Prevalence of CTX-M-27 among the sequenced genomes, plasmids, and whole-genome shotgun assemblies available at NCBI or IslandViewer for 413 important pathogens (see methodological details and complete list of analyzed pathogens). Values reflect percentage of genomes, plasmids, genome islands, or whole-genome shotgun assemblies that have at least one hit to the AMR detection model. Default view includes percentages calculated based on Perfect plus Strict RGI hits. Select the checkbox to view percentages based on only Perfect matches to AMR reference sequences curated in CARD (note: this excludes resistance via mutation as references in protein variant models are often wild-type, sensitive sequences).
| Species | NCBI Chromosome | NCBI Plasmid | NCBI WGS | NCBI GI |
|---|---|---|---|---|
| Enterobacter cloacae | 0% | 0% | 0.32% | 0% |
| Enterobacter hormaechei | 0% | 0% | 0.04% | 0% |
| Escherichia coli | 0.12% | 0.59% | 1.46% | 0% |
| Klebsiella pneumoniae | 0.24% | 0.12% | 0.53% | 0.95% |
| Klebsiella quasipneumoniae | 0% | 0.21% | 0.13% | 0% |
| Salmonella enterica | 0% | 0.16% | 0.01% | 0% |
| Shigella boydii | 0% | 0% | 2.22% | 0% |
| Shigella flexneri | 0% | 0% | 0.62% | 0% |
| Shigella sonnei | 0% | 0.97% | 0.29% | 0% |
Model Type: protein homolog model
Model Definition: Protein Homolog Models (PHM) detect protein sequences based on their similarity to a curated reference sequence, using curated BLASTP bitscore cut-offs. Protein Homolog Models apply to all genes that confer resistance through their presence in an organism, such as the presence of a beta-lactamase gene on a plasmid. PHMs include a reference sequence and a bitscore cut-off for detection using BLASTP. A Perfect RGI match is 100% identical to the reference protein sequence along its entire length, a Strict RGI match is not identical but the bit-score of the matched sequence is greater than the curated BLASTP bit-score cutoff, Loose RGI matches have a bit-score less than the curated BLASTP bit-score cut-off.
Bit-score Cut-off (blastP): 500